US PATENT SUBCLASS 431 / 84
.~.~.~.~ Held by latch, latch released by sensor

Current as of: June, 1999
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431 /   HD   COMBUSTION

18  DF  TIMER, PROGRAMMER, RETARDER OR CONDITION RESPONSIVE CONTROL {26}
75  DF  .~ By combustion or combustion zone sensor {2}
77  DF  .~.~ Of shutdown by response to sensed combustion failure or overheat {4}
83  DF  .~.~.~ Sensor movement losses means holding shutdown valve open against bias {1}
84.~.~.~.~ Held by latch, latch released by sensor {1}
85  DF  .~.~.~.~.~> Expanding fluid sensor

DEFINITION

Classification: 431/84

(under subclass 83) Apparatus in which the restraining means is a catch device that holds the valve open by projecting into a notch or cavity and releases the valve upon withdrawal.